Quantcast Appendix I Glossary - Cont'd -141200442
 

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VOLTAGE DROP-- The difference in voltage
TRIP-FREE CIRCUIT BREAKER-- A circuit
breaker that will open a circuit even if the operating
between two points. It is the result of the loss of
mechanism is held in the ON position.
electrical pressure as a current flows through a
TRUE POWER-- The power dissipated in the
resistance.
resistance of the circuit, or the power actually used
WATCH STATION-- Duties, assignments or
in the circuit.
responsibilities that an individual or group of
TURN-- One complete loop of a conductor about a
individuals may be called upon to carry out; not
core.
necessarily a normally manned position with a
TURNING GEAR-- See JACKING GEAR.
"watch bill" assignment.
TURNS RATIO-- The ratio of the number of turns in
WATT-- The practical unit of electrical power. It is the
the primary winding to the number of turns in the
amount of power used when 1 ampere of dc flows
secondary winding of a transformer.
through a resistance of 1 ohm.
VOLT-- The unit of electromotive force or electrical
WATT-HOUR-- A practical unit of electrical energy
pressure. One volt is the pressure required to send
equal to 1 watt of power for 1 hour.
1 ampere of current through a resistance of 1 ohm.
VOLTAGE-- (1) The term used to signify electrical
WATTAGE RATING-- A rating expressing the
pressure. Voltage is a force that causes current to
maximum power that a device can safely handle.
flow through an electrical conductor. (2) The
WEBER'S THEORY-- A theory of magnetism that
voltage of a circuit is the greatest effective
assumes that all magnetic material is composed of
difference of potential between any two conductors
many tiny magnets. A piece of magnetic material
of the circuit.
that is magnetized has all of the tiny magnets
VOLTAGE DIVIDER-- A series circuit in which
aligned so that the north pole of each magnet points
desired portions of the source voltage may be
in one direction.
tapped off for use in equipment.

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